If you think about it, losing weight is actually kind of mind-boggling. One day you're carrying the extra pounds, but after a stint of healthy eating and regular exercise, you're physically smaller. So where does all the fat go?Popsugar looked into it and it turns out, fat makes a pretty surprising exit. "The correct answer is that most of the mass is breathed out as carbon dioxide. It goes into thin air," physicist Ruben Meerman told Popsugar. Yes, you read that correctly: You breathe out fat. Apparently, it's a rough 80/20 split between fat predominantly being expelled from your body via your lungs, with the remainder being evacuated via your urine, feces, sweating and tears. Even many experts didn't know this information. According to the head of the UNSW School of Biotechnology and Biomolecular Sciences, professor Andrew Brown, there are plenty of doctors and dietitians who were convinced fat was converted into muscle, or that it turned into either energy or heat and was "burned" in that way. Sadly, if you're thinking that instead of your next workout you'll just breathe quickly, you'll be disappointed. Fat has to go through a metabolic process before it's actually lost. Having said that, there are plenty of ways to boost your metabolism, which will speed up your rate of fat loss.

If you think about it, losing weight is actually kind of mind-boggling. One day you're carrying the extra pounds, but after a stint of healthy eating and regular exercise, you're physically smaller. So where does all the fat go?

Popsugar looked into it and it turns out, fat makes a pretty surprising exit.

Even many experts didn't know this information. According to the head of the UNSW School of Biotechnology and Biomolecular Sciences, professor Andrew Brown, there are plenty of doctors and dietitians who were convinced fat was converted into muscle, or that it turned into either energy or heat and was "burned" in that way.

Sadly, if you're thinking that instead of your next workout you'll just breathe quickly, you'll be disappointed. Fat has to go through a metabolic process before it's actually lost. Having said that, there are plenty of ways to boost your metabolism, which will speed up your rate of fat loss.